Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb328d1092dfb620aa239371ee7708dc17f40e5979903e9cb86b444f601794de' 
  AND token = 'G4BQImmOYRQoGkm1ahdoCi6gUSUukKIgByJg0o+ciD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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