Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f242edaf4a40aa909e454b78f7d39569172865bc17bceb17e81469886b2b45e1' 
  AND token = 'Y+z93Z/S4u1IPBCwiQ6iNmNAEf8vkYY6Yk/0fcAt+eQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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