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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f080e032488700b46d70d8fad1fb2f0fd23a393c1e71e31da8b8ac6123b7a71' 
  AND token = 'kTA7ruyR7RQj0d3LcPmwvAwmaU7dzVYZKr9Virw9FPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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