Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '951d593888f6b0d64a9e78cf857e56b148a58ede424a82a11d8a07389a36c64a' 
  AND token = 'co+/T706P8oEOCJXdcgIMFMQHVkKqv2U6jOlI75i55Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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