Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19a45d94dc4f18fa04fa152f5698628b80bbea5509605335b9a0cf439fd381a6' 
  AND token = '/q92NntC/Nogt5oxOMP3d9De4mz53jqcgwIw0LPmlXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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