Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c0301597f10932096414bad4bffcfc6fbc14565dda76650cee067fc522f5fe3' 
  AND token = 'DPbmpm2OFZHoYr7c3669nfpSNmwMr8hPEQ+06JNEY64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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