Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa49a2580fbe84f0fb193d7ad87155f5ce6c2b0dddf2f8826d9a760091720932' 
  AND token = 'lTjf6s+iHHMqsc1YCEFeVTU6u3k/X/aTy06USaZpiuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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