Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '336e443af9b071c2539fe442aaeb9aa3930f163fd4c63d9d7b29afd1df20037c' 
  AND token = 'yi+QTA8a/inXPja1oOUP0S2njMG8C4qteM6wusRXZ2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}