Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b344f2fb9379db18768245789b8ad1e7634aba4f30d1abacd3b4abfbeb58551a' 
  AND token = 'E+QFU5rrj35mekM9FD3fgQyp1lVpa0o+xqisQ6SJ3lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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