Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6df00a7c3a919f987e89e269239f48fbcc5ac0c9b3010939d730fa38d6406fd5' 
  AND token = 'qaat8ppkjqtIOy+g/RKJSfv1GANCRCrvML+iTNt3Csk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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