SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd42f046af238e233537e8757a39b8932730777bcd4f06716ab1ed345bc104fc9' 
  AND token = 'DzhkbqTVmvmq0Yx/u17VNmAdELqYQjBzrFgl/3xQeEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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