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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06995928241a684916a58c93425c6b9eb911bac2b60fa308968656f54d30498d' 
  AND token = 'PUTTbgHhgVYtj/IQ7Um+a6zv7AI9rhRyWdwTf007EFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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