Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6190ab0bff07d0f922a194e0d536b28ac6356f82fb16581a3315a0ebb7a26d0b' 
  AND token = 'effPS7EApMjcrZWVWuPSmUSTbcs/dCedhlM7msNgBQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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