Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fba4c934ea365e187c63e0966009c3ec5d0dba4925761ee9ed7ce381bd062444' 
  AND token = 'LN8K5aJBmItAZwnjd/zij9FQnfDB1rp8omiHKBByVgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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