Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aa59cef7f6884197fbd3bda64d638bcb2bada9717898bd13d48668f3d1a5b87' 
  AND token = 'p6qPRMm7XFA/qi/SEt+Euuc9/Tt7k633BEUnMOgWh8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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