Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '734a968c98e827fac2a28efce939ee5038a3d028ce25ec0061c4e226365c1db0' 
  AND token = '1PexptHxGe4c4YA/rjDqijyVVyLsJcJLXASmkDXrDrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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