Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35b0c02e4dbe9919d703b392c753979fcb0285ad3bc3cde0d8538a01ad84c445' 
  AND token = 'kYsksEIk3nApuUjdk23s9WXHpvP6WwxMC4ThiOF96lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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