Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a6bf579ad3f78db00bf985ac66dd44def975ba64995837e4376403cc4c1f2ff' 
  AND token = 'MAzi+vOM3wckTkI5v9DU10XNl95GMaZhE2oqb9mU0c0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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