Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecb8d1c93884a48bb9c5f4b92adc818524efc8089f8e641a966baea9805a6cef' 
  AND token = 'yb7CnLzWyDeE3vj2fGc++TLyep1ytE/WDJBqy00Z/+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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