Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd080b70bab8f12be32fb66c23eb041582fafd7b4e1ed9738b08c83c3aa914915' 
  AND token = 'C5CYgy2dnNQ9+4uBf3H63niIiN4ZzW+HKVD5Qs2TL4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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