Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c103644ad51796b65f243d04846fefcacd934c932bf96b3f36fabc33b7ee87d3' 
  AND token = '8dEj7FH2otkMOkX+tV7344gZRUZfVDK3zHAKv02pTJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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