Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a66d4d9cd082e462f0b12d7573c5516f99c4f9c917ef4b201f79e8b1966afce2' 
  AND token = 'lFaPLOKb34yOUwpm4uSAW0JHLDj5XXTU3k1XGeHb02g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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