Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd5673b0bc215c8e24f23b1c88034aad41ff0fd444cb17516fe511b5373ce818' 
  AND token = '/ZCPWqRdxUj0qvsdEeakPoXb+qtAnTh+f1EepOwgMWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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