Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bec1753e56b67086794723ff2c883b52cf678919a5f0e017dbd1592b5041fa59' 
  AND token = 'mAwjIz0UN+lb6ijlF84R571P0pu6+HMb9FQTAZDl2ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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