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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09d231ab9ac25ec4b7b6fb58ad5d42111a4007f087541d59df9fb0bbb8e15ae1' 
  AND token = 'Z07ArJcGqpRjicPgz2m3/+CWxlEC1nzFxaHMFF0rM+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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