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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4701e9992588b2b028a8498d44545da0b52597c9bb795fe79c1c1f52ce6897e' 
  AND token = 'gVrLt1Gm0CK/72wVdIQ9g05/d8ufPPSrP9SkOFr6GCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}