Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '861f425978c2de5594cb4707705af27224e7197f10dae2079b85ccb79772438e' 
  AND token = '2h/ZG8xXr1wzwWotZ8K5HEcLwc6y5gBlhilQeLtvX/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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