Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb9f0b73c2c08479d7f2d620768dc1350f3c39e5782d8277bcf2bce156e38a36' 
  AND token = 'dGTyF3TZ3nAHrPwDle8EZJ0VjvhgnoPNmkVC0d78OPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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