Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0282b53c3f4222b67fbc5e4218a10656dabc3b8a5d26795599d4913022096d02' 
  AND token = '6a3fGuFWS9whKfPDeqtvj4c1w9XbPjm7r3P51ATFH2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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