Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a64e48911f6da8d53f460f4b81eb534ef39a7c5546188b717397cb7d2664edc4' 
  AND token = 'RNVRao6ZG8lD+XPlZd3WT+PpnfsYG5Uh8mQMIf4CRu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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