SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0c20411ca91684fa631345e76a2fcac71b0a9ea3f26540c06e1bb8518fbd766' 
  AND token = 'Zyp+QwQ9KgH2SIhSQ9/Gjw+fRdbGp/sJk3kHa/9wxHY=' 
  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"
    }
  }
}