Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce548c5147c3f3da14053c2881b7836c488c262f0c04691be6c6ec316026f77c' 
  AND token = 'giWRQNkeo/+nbpAfeAy+cUFqf+XNFnV7mDx1My4RSP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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