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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '711f1fdfac5f7117d115ad48fd3f9131f021d63cc1a197d28760825485aaaa92' 
  AND token = 'XISAvYGh23p76M0WXQIYiufkLrGHPAlvrtAWs9R1M4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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