Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4e1d8ccec0495e1aaf3e134c6d175dfdf339b556c22b080937569c0dd04ecc' 
  AND token = 'GP3qU0Y4fafvlZboEIAaCo11UJEBVgJp1gB9+2HAs1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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