Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e18759df2e99b274bab7828b6e04e0b86796a46381c20011e084cd94592eb6d' 
  AND token = 'H9CWMULdyyKKE69OLF6BFHH183CMZDywg8G2Yrn4Bnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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