Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9888b72b44e68099c6cb68561df9327de5ed446581b3884a79588b2f222ec866' 
  AND token = '8OlyttXF3ovbSgPcbBYiH4Ccpdw1hF5Bey79fv55ERc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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