Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b59c11675e17cc5e9b16b2db02086b52f090721ca490a40a1a3a852cfb5c9675' 
  AND token = '3IYMZ3k0n6ScxiqLgomGlqsF65nonNwP2/UVc8dGk7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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