Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e2a8a1e5c0c09078efcf4227c307119693e760bbc91097f959138905f5f53c9' 
  AND token = '0mcWfzxOl0+IMx7R/intD0OVYheLBNmaMEEVhwhBNjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}