Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97c39c12f6a1fca0c798bfb5b6ef177424a7aba67685c213f75e8c9283d368d3' 
  AND token = 'N4qFPXMdSBSl9u8yF0VUmxB4zNhIOEXu9gUGh46Jbr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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