SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa5bbb4906148711487a47a26e4f28e4d887d2b8fd93edf70a777b04e2fa894e' 
  AND token = 'YHG+b0YiwUDwz8wgRcLkr+CVvJ97ghPPpnVqu5J7YKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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