SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dfc27caf80eab4117bb67fd579eb39c4868f27345be32c2bd86256b7b7f3ffa' 
  AND token = 'XSgCN2gSLVKqFiqX+w7Tve0He5U1PMBjOhatqCkZVG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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