Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cd4c9611acd707e56af432cb3255991bc6ec0fe626b1303861f56dce08df7ac' 
  AND token = 'Fazn1u03yVJGTbYazol2kOKRj6lnFaK/YzuM//oHqvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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