SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8b967054702f84f0a096d9020c05a28dee074566fc51a3da3cef5b7437fc01b' 
  AND token = 'VOggQRvZB1vG03yjkjumFcGbzVjFFVw8o1DKWyOBkdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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