Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '584be2b67e63107ff69d8a71317b6b7ab0776454142e6a890c34bf4b5bb17386' 
  AND token = 'T4Cek0qmvVJ5a2ki7bSMSDL9SKxCqqPH0iwH0Sp8X+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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