Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7a2989e19ec23fac30aa5dda3184338e160943f0dd12b3d78d83d2c04b0735f' 
  AND token = 'Zc0GhPsO3byLMbqAqOK/1d05//6JDz0GlNk/vPi+BeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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