Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8f324d71e817ab64bfd012c18f5009cd6c53e9ab58e97977107d5f6ac21f546' 
  AND token = 'TsgFxa9qT829Pq1AjqQNS9Lhu8N00+yD8E1cot0PaSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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