Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e55a8db55284214a968a9031de369ddc52f2fa4d29981f6c19b9ca6cc7019e6c' 
  AND token = 'cAuCc0vyxsVpw5Tj+0RaUbDYC5dtTGZtj6P5830CMbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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