SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd694137430dd33039f3c047f7872c9dc209f27b63db42b594d4466e46d5a0265' 
  AND token = 'hwhl7jcDJ1OTZG8WCQwsFF3WisHS0qXCXI2BZX+AuhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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