Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf0aa2d8a9f5b4a8643586fca211134384d8d0774ca102354406a321966415a2' 
  AND token = 'K4uLYfHCh10iC4Dt/mGPdEJPnsCbyoQ6HcqZJoiLigo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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