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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aa263119a7e48d0c4b600ea0074c89e0930feed12343956022feccb8228d43a' 
  AND token = 'GPHnkJh3OyhBZgVrdhrJWDRCqNCU1SR7ngEj+FrZ6t4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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