SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4572903e586d294d112f20b60089d0e53aeca9bb03f798579e8f5f89b4666c5c' 
  AND token = 'wQXGZa9vWBHlMe01WC+Vg+QHRKNfieWTcMqEOyQp0RY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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