Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b64034132654dc427d320c9ffb09864bf3f85c104f24eb90b3a10f195ff7866' 
  AND token = 'u61PlYXsdi3r6FagHfzxnZ+DUiMBNdKNxZW3rrwGeow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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