Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1b3c4340ea923f77f8931e314ed862dd6f5f32d6ae9929df2c20527e5473272' 
  AND token = 'UbI2SKz9SGjd68sFFVze+DTYN+VbAEhcQp4pTB/L5rM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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