Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8a7452b66b7adcf642b4462f27daf147bab02a0fc363ed56152d85d471ecf6d' 
  AND token = '87sKRXnc7kDJ8njDgr33oWbLhabM0EKem1EExMErsEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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