Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dfa7623c4301023597721f7f57039b6998f84ec145e7733ccb9dac56526d428' 
  AND token = 'O26tw5qlmknSyL9sFdyZ7s+CppwHcmLGFVeq+NvRlC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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