Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76af6915409b3ba7aef30f76a4dceccac0038ce84cf6dcc9f656df63b818e2df' 
  AND token = 'bBxEHEg7luvOiS9+IrrDCMOkjV9BcKCgDqXEstDnrNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}