SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '378c725dafb90f30f455eb865f643411a8df22fa8c6c51b3eb4916005604252f' 
  AND token = 'QZax9R8thypY5ZfPUJlyBiKzBKvqRvri2qe4VVHYoqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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