Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62e97bbf383dcc1320117389add0cd5ada1c498f0ab62fa1be8259627a6a021f' 
  AND token = 'g8YDBMd9e8+wPPn1WGSe0CYlsY1DeKBXytbdiUk8jmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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