SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16d58279f885f7be489fdd3864ccd3833e25397c0510af817ba2a87499f48a19' 
  AND token = 'EO2ZHjUARTpC6CgqZ0v4QaOfC9geBJZ99+jrGugt0ZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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