Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f94f3e7e833f3bc951a79731eabeffaca6da33afb70b0aa90ae7db505c2b6769' 
  AND token = 'LkMYgZHG3h8lwyoCmllP90wVVsT6OnPfyy2OHUuXKEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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