Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f25cce4969a132dd6b83963b0afd2968e28a72c87c949c7d73e67bb854ea6a90' 
  AND token = '6EcyrgFFOh1Fv5OnxT7ZVpsMwPQbIfC9siKQaLb+ZYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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