Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2246923a59d9e3e82606cd04671cc79e07e6eab80825ee6387eb90beba4539f5' 
  AND token = 'mH1YuC3GcR14qdG1JEwDkyyNkdox4f7HKoOBL0E1crs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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