Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95bbdfc686e0c669b6db12372b56816a7d81415279cca0db474501caa2453cf4' 
  AND token = 'nGcJiT/5G3UcZ6miSfnRZEido16Io00+suhjyT2c8JI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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