SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffdee5f5b79dfe65df153b6f242cd538dc90683f59841a7f576ba5e0b5006069' 
  AND token = 'NePmFFK2hZ+4gUDSuSZVKGAKHvNF34xWwJif+Pret+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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