Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '952d8645d28209f89914ef2291310181213ca8a660271858b8a0c78e61442d0c' 
  AND token = 'f7IhN3ymyvhXjBfKFrnjxLprqjm2YAfjTlgycXA4lZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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