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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41cee684aac78e2d1964c87aa56953f951cb95c2c52af1634631418cf51db9b8' 
  AND token = 'ODnPO0yZ8uSEEZ/ZueLooPEc/SODLr4Jp8dyeznXksQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}